Mixing machine



May 6, 1930. sT c'l-l ET AL 1,757,098

MIXING MACHINE Filed March 14, 1929 4 Sheets-Sheet l May 6, 1930. s cl- Er AL 1,757,098

MIXING MACHINE Filed March 14 1929 4-Sheets-Sheet 2 23 I q yam/5 May 6, 1930.

F. STREICH ET AL MIXING MACHINE Filed March 14, 1929 4 Sheets-Sheet 3 ive/ 2 5076: fizz/27v Sirez'dz Patented May 6," 19301 ins ' FFI i FRANK STREIGH 'AND WARD P. nnwooi), or retina,- ,ILiiINoIs; Assreitons rouivloiv MACHINERY COMPANY, or JOLIET rumors, .n'oonroltnrion or ILLINOIS:

p MIXING nnoninn 7 Application filed March 14, 1929; Serial in), 346,843.

This invention relates to mixing machines of that type which employs a rotatable mixing bowl in conjunction with-a pair'of mixmg arms which are moved through the mass in opposite directions throughparallelver-- ti'cal planes inpredetermined orbits or. paths of movement. The principal objectof this inventionis to provide novel means whereby the bowl may be tilted to discharge the is I ' it is beingitiltedand for actuating thefisus-v contents after the .mixingoperation has been concluded.

Anotherlobject is to simplify the mecha-u nism for handling the mixing bowl while be;-

ing tilted. Another object is to providenovel means-for suspending the mixingloowl while pend ng meansby manually or mechanically operated, means.

tween the frame of the machine and the bowl nections and provided with novel means for tilting it in order to discharge its contents.

It further consistsin mixing bowl rotatablymounted in a saddle capable of beingclamp'ed to the frame of the machine and swingingly dsu-pported thereon. It further consists in a machine in which the swinging'supportis provided with'mechanism' forswlnging the saddle and therewith the bowl away from the frame and finally tilting the bowl into aposi- 7 'tion for discharging its contents.

, It further consists in the severalno vel features of construction, arrangement.andfconn -Ibination of parts hereinafter fully'set forth and claimed p 7 i A The invention. 1s clearly illustrated-1n the drawings accompanying this specliication in Figure .1v is a sideelevation of Another object is to provide a swinging supportingzconnection be p 7 x'The frame is formed with a-widened base porin which the bowl isrotatably, mounted and capable of being rigidly'connected with'the framewhereby the gearing for rotatingthe bowl may mesh perfectly when the'bowloc-f cnpiesits normal position wherein the ma-f. terial is mixed therein. I Anotherv object is to a mix g Fig. -2is a frontelevation thereof with the v contained-therein; I r r ;E1g.- 3'-1s ajv'ertical cross section taken on:

bond shown in cross section to illustrate parts the line 3- 301" Fig. 2,- and showing'the mixing bowl, in solid lines, in, anfintermediate position and in dotted lines in a tilted position; r I o Fig. dis a planiof the machine; and

Fig, :5fis:a detail fragmentalside elevation of certain members of the *howl tilting niechofthearrow 5 in Fig.2.

anism, the View being taken in the direction Referring to said i drawings, the 'reference substantial construction upon the .op-j

character 6 designatesa frame 'of solidanct I erative parts of the machine-rare mounted tion 7 and vvitharecessedstandard-B rising therefrom. pllpon the standardisf mounted agear case El-in which are containedcertai gears as will appear hereinafter. i

. Thai-mixing. bowl isljseenl at.l0,and said bowl is,rotatably mounted saddle 11 the saddle in upright position-during the mix- I mg operatiom'and, as'shown, said means comprise-a clamping member13 hingedly secured to forwardly projecting ears 14 by an up-' right pin 15 which extends through an ear'16 formedon the clamping member. The'forward end vofthe base'is formed with a semicylindricalsocket17 and the clamping membe: is formedwith -a companion semi-cylindrical portion which completes a cylindrical socket in which the hub 12 is removably held.

h/leansareprovided forseouring the clamping member in ,clampingposition, which means; maycomprise alatch member 18 mounted upon a'roc'lr shaft 19 and arranged to' engage with alugQO formed upon the free endof the clamping memberj13. The

rock shaft 19 is rotatably mounted inears 21formed on the base 7 and. has an arm '22 upon its outer end by means of which the latch 18 may be raised to release the clamping member. A clamp'lever 23, pivotallymounted upon the base .and'having a pin :24 arranged,

to engage thearm 22 in a wedging. action, is

provided forpressingthe arm 22 backand thereby tightly engaging the latch 18 with the lug of theflclamping member 13. pressing down upon the lever 23,-the-saddle is tightly clamped to the frame of themachine, 1 and by raising the lever 23, the arm '22 is freed therefrom, whereby; said arm}, may swing upwardlyto disengage the latch from the clamping member.

. Uponthe bottom of the mixing'bowl is j securedfa beleved ring gear 25 which is "adapted to mesh with a beveled pinion 26 205' mounted .uponthe end of a shaft 27-journaled in bearings 28 carried by the base, andsaid shaft27 is rotated by driving means as will be hereinafter explained. During the mixing'operation, the shaft 27 is rotated, and,

- consequently, the mixing bowl isrotated upon its verticalaxis. 1 j Pivotally supported upon brackets 29that project forward fromthe frame of the ma.-

ch'ine"are two depending bowl "supporting arms 30, the lower ends of which'are pivotally connected to" the saddle 11, and supportthe saddle andfmixingi bowl. wWhen freed from i the clamping member, theinixing bowlmay tiltupon the pivotalconnectionbetween the supporting arms 30 and saddle.- As shown, i thesaddleis'in'theform of a horizontally eX-- tending" bar" 11 having upturned ends 11 i. which are pivotallyconnected-with the supurv porting arms 30 by bolts or other pivotal connections; 31. Conveniently, the; pivotal con nections betweenthe brackets 29 and support- 1 ing arms 30. maycomprise-bolts orthe-like-32 From the ab0ve,it is apparent that the saddle 11 and the'rewith'the'mixing bowl 10' are suspended from the-supporting brackets 29, and,

=whe'n freed from the clamping'member, may be swung-outward awayfrom the standard- Softhemachine. V V hleans are provided for swmgmg' the supporting arms 30 upon tllQlI'PlVOtfil connections with the brackets 293-150 thereby move the mixing bowl in a forward direction away from the standard 8. Means are also provided for tilting the mlxing bowl upon the pivotal connection between the supporting arms 30 and the saddle l'l' after the mixing bowl has been moved beyond the standard 8.-

The means shown for accomplishing this result will now be described- Bigidly mounted upon a rock shaft 33, which is journaled in the two side walls of the standard 8' and extends from side to side of the machine, are-crankarnis 34 and- 35,

to which are -pivotally connected links 36; which extend to and are piyotally connected to the su ortin arms .30 intermediate their ends. These pivotal connections may com prise bolts or the like 37 and 38. v The crank arm 35 may be in the form of a segmental gear 39 (see Fig.5) :whicl1' meshes with'a: pinion 40-mounted upon a shaft 41 jour-' naledin bearings carried by the standard 8.

The pinion and segmental gear may bein theformof worm gears whereby the crank armsf34 and 35 will be locked in any position'of adjustment. The shaft 41 may be provided with means whereby a hand crank may be applied theretoprit maybe connected 7 with anyv source of mechanical power where. by it may be driven mechanically. It Wlll be apparent that by rotating the shaft 41 in the properf direction, the crank arms ,will be partially rotated and the supporting armsf 30 swung forwardthrough the inst-rumentality of thelinks 36.

For causing-the tilting actionof the mix ing bowl, the saddle 11 isconnected to the longitudinally extending slot. '45 through which projects a stud 46 which is secured" to and extends outwardly from the standard wardly, the link 42"will be drawn'forward by the saddle, thelink riding upon the stud; 46 until the rear endof the slot 45 engages withithe stud, whereupon theforward movement of the link is arrested. Thereupon the link may fulcrum upon the stud 46, and fun ther forward movement of the supporting arms30, therefore, swings the saddle and therewith the mlxing bowl upon a fulcrum,

8. 'ltwillbeapparentthatawhen the hub i 12 is released fromthe clampingmember 13' and the supporting arms 30 areiinoved out r 7 comprising the connection between the arm J 43 of thesaddlell and link 42 and tilts the mixing bowl '10 into the position shown in;

dottedlin'esin Fig. 3, are'discha'rg'ed. is

mixingarm's 47' which are moved in'opposite whereuponits contents ASSOOIatGClWltlL themixingbowl are two directions through two vertical planes while the mixingbowl is beingfrotated, said mix-" ing arms having upontheir lower ends mixing fingers or paddles 48 whichareadjustable lengthwise of the arms. Each of the 1n1'x1ng' arms s ointed between its ends. as

at 49, to enable the'lower part 50 of each arm to beswung upwardlyand out of the bowl when the latter is to be tilted, The upper part 51 of each arm is formed with a pair deem 52 'atits' lower endbetween which the lower part 50fofthe arm is held andpivoted'thereto by a pin 53. A set screw, or.

other clamping device, 54 is provided in one of the cars 52 for'rigidly holdingzthelower part 5070f the arm in its operative position.

Two crank wheels 55 rotatably mounted in the gear case 9 are provided for oscillating the IIllXlDg' arms 47, and said crank wheelshave wrist pins 56 projecting therefrom which engage in apertures containedin the upper part 51 of each mixing arm. In order to vary the sweep ofthe mixing arms, the wrist pins are adjustable radially of the crank wheels, and, as shown, are mounted in slide blocks 57 slidably mounted inthe crank wheels and having adjustment screws,58-

whereby each slide block may be adjusted towards oraway fromjtheaxisof rotation of the crank wheel in which itismounted.

Supported upon the gear case Qisa; cam

block-59 inwhich areformed two oppositely disposed cam grooves 60 in which travel pins or rollers 61 carried by the upper ends of the mixing arms 47 ;Th'ecam grooves 60 are shaped so as to control the niovementofthe upper ends of the mixing arms, wherebytheir lower ends may take predetermined orbits or paths through the mixing bowl. To obtain the most .efiicient results, particularly with certain kinds ofmaterialsto be mixed, it is desirable to have the m xing ilngGFSiI'aVGl downward along lines approxi1na-te 1y. parallel with and close to the side wall of the mixing bowl, and thereafterto follow the curve between the s dewall and bottom of the bowl and thence substantially parallel with the bottom of the bowl past thecenter thereof and then upward ,and back alongcurved lines towards the side ofthe bowl. Such an orbit isindicated by the dotted lines inFig. 2. n s s I By varying the radius for the JVllSt pins,

and byvaryingthe shape ofthe cam grooves 60, other orbits or paths of movement maybe I imparted to the mixing fingers 4 :8,fand byu together.

advancing the wrist pin onions crank wheel beyond the other, various relative movements may be had between the mixingfingers. This is made possible becausethe upper ends of;

the mixing arms are movable independently.

being thrust through the same. Inasmuch as the mixing fingers-move in opposite directions, they pass through and lift up the mass, 7

thereby thoroughly stirring it and mixing it The drive mechanism forthe mixingarins and mixing bowl willnow be descrlbed.

Mounted upon the base 7 is an electric motor' 61 which furnishes the power for driving the mechanism, and sald motor is connected to a "speed treducing gear mechanism 62: 1 also mounted uponthe base 7. The shaft 6 3;of the speed ,reducing gear mechanism has-a sprocket wheel 6% thereQn which :is connected to a sprocket wheel 65 on the shaft 66 of one of the crank wheels 55 by a sprocket chain 67.

The shaft 66 and shaft 68 of the-other crank wheel 55 are geared together by gear wheels 69 and 70 that may run in oil contained in the.

hollow of the gear case. The. shafts ,66and 68 are journaled in bearings 71 carried by the walls of the geaucase 9. On .theshaft 68 is a sprocket wheel 72whichis connected tosa sprocket wheel' 74 on the shaft 27 by a sprocket chain 73. The gearing just describediforms a very simple one for trans J mittmgpower from the dr vlng motor; 61 to the mix ng bowl and mixing arms.

Extendin throuoh the ear case 9 is a t: C) it) chute 75 through which the ingredients to be f mixed-may be delivered to the mixing bowl from a point located'abovethemachine. The discharge end of the chute is located vabove the mixingbowl when the latter occupies the position assumed when clamped-tothe frame by ,the clamping member 1'3. I V

V In the operation ofthe Linixenthe 1na-.

I teriais to be mixed are deposited in the mix ing bowl when the saddle isclamped in place on the frame of the mach ne. W hen the motor and the mixing arms moved in opposite directions throughtheorbits or pathsheretofore w described. The mass contained in the mixingbowl is consequently carried around with the bowl and. as the mixing fingers pass through the mass they cut, throughit and lift it frointhe bottom thereby thoroughly mixing it. ,When the operation has been completed, the motor is stopped and the clamping men'i ber 13 released-and swung back from the hub ofthe'sad'dle. The set screws 54 arethen turne d' back toloosenthe lower parts of the mixing arms wherebythey may be swung upwardly out of thefbowl. I

The shaft 41, 'isthen rotated thereby turning the crank arms '84 {lad 35' upon their axis and moving thelin'ks 36 foward. V porting arms 30 and therewith :the saddle 11 and mixing bowl are thereuponmoved forward untilfthe'endo'fjthe slot in the link42 engages with the stud 46 whereupon the forward movement of the saddle is arrested and,

The .sup- 7 as a consequence, further. forward movement of-the supportingarms causes the saddle to fulcrum upon its pivotal connection'with the link 42 and the continued forward movement of thearmsffjO thereupon tilts the saddle l1 andtherewith the mixing bowl '10 upon said fulcrum, thereby discharging the contents of the bowl.

Before .the bowl'is tilted, any ma terial clinging to the mixing arms andfingers'is removed therefrom and the arms swung up- Ward. out of the path ofmovement taken 95 is started, the bowl is rotated upon its ax s 7 themixing bowl whenbeing tilted. After the contents of the bowlhave been discharged,

the shaft 41 is rotated in the reverse direction, v

thereby returning the mixing bowl into its horizontal position, the mixing arms lowered into the mixing bowl, and the bowlreturned to its normal position with the hub of the-saddle contained in the socket 17 whereupon the clamping member is secured in place and the machine is ready for another sequence of operation; I r

' In its present form, the mixer has been shown and described for use in mixing dough, and it is highly efiicient for this purpose. The machine, however, may be used for mixin other ingredients, as is readily apparent.

Iore or less variation of the exac'tdetails of construction'is possible without departing from the spirit of this invention. e desire,

v ally suspended fa bowl supportingsaddle in which said bowl a r be clamped to the supporting frame, support-' 'LettersPatent therefore, not to limit ourselves to theexact form of the constructionshown and dei a supporting frame, ia rotatory mixing bowl,

means for rotating said mix ng bowl, sus-. pended, supporting means for said mixing bowl pivotally suspended, from said frame upon a fixed fulcrum, HIICllHBZLIlS for moving said supporting means uponits fulcrum.

3. In a mixing machine, the combination of afsupporting frame, a mixing bowl, a bowl supporting saddle, means for clamp ng said saddle to the supporting frame, and supporting arms connected to said saddle and pivotsaid frame upona fixed fulcrum. 1 p

4. In a mixing machine, the combination of a supporting frame,a rotatory mixing bowl,

is rotatably mounted, swinging supporting means for said saddle pivotally suspended from said frame upon a fixed' fulcrum, and clamping means for securing said saddle to said supporting frame.

5. In a mixing machine, the combination of a supporting frame, a mixing bowl, abowl supporting saddle in which said bowl is romates moving means serving totilt thebowl where I by-its contents may be discharged.

I .6. A mixing'fmachine comprising a sup porting frame, a rotatorymixing bowl, a bowl supporting saddle in which' said bowl-is rotatably mounted, saddle supporting arms pivotally suspended by'said frame, means for moving said supporting arms upon their ful-' crum', a link connected to said saddle and having a-limited amount of movement rela tive to the supporting frame,and'meaiis for releasably clamping said'saddle to the supporting frame; 4

7 In a. mixing -machine,ithe combination of a supporting frame, a rotatory mixing bowl, a bowl supporting saddle in which said bowl is rotatably mounted, said saddle having a member adapted to be r'eleasably clamped to thefs'up'porting frame, supporting armsconnected to said saddle and pivotally suspended by said supportingframe, arm actuating links, and'crank arms connected to said links.

8. The combination of a'supporting frame,

, a rotatory mixing'bowl, pivotally suspended supporting means for saidinixing bowl, and means-forswinging said supporting means,

1 including a segmental gear anda pinion.

- I 9. The co n bination'of' a supporting frame, a rotatory mixing bowl, pivotally mounted supporting means for saidmixing bowl, and

means for swinging said supporting means, including a segmental worm gear and P1111011. 10; In a mixingmachine, the combination of a supporting frame, a rotatory mixing bowl, bowl rotatingmeans, a bowl supports. 3 ing saddle in which said bowlis rotatably mounted, clamping means for clamping said arms pivotally suspended fromsaid bracket arms and connected to. said saddle, and means connected to said arms and to said: saddle for saddle to the supporting frame, bracket arms v 7 upon said supporting frame, bowl supporting swinging said arms and tilting the saddle and therewith the mixingibowl.

e 11. In a mixing machine, the combination of asupporting frame having a gear case at its upperend a chute extendingthrough said gear case, a mixing. bowl, and supporting means for said mixing bowl arranged to support said'mixing bowl'underneath, said chute and capableof moving said mixing bowl into atilte d position beyond said frame. I FRANK STREICH." WARD P ELWOOD.

tatably mounted, said saddle being adapted to' 7 ing arms connected to said saddle and pivotally suspended by said supporting frame,

means for moving said supporting arms upon their fulcrum, and a link 'connectionb'etween limited amount of movement relative to the supporting frame, said link and the arm said saddle and supporting framehavinga 

